Patents by Inventor Frank Friedhof

Frank Friedhof has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Device and method for diagnosing an exhaust gas sensor
    Patent number: 9109527
    Abstract: A device for diagnosing an exhaust gas sensor, in particular a linear oxygen probe, for an internal combustion engine. A diagnostic unit is configured to control a first and a second current source in a coordinated manner in order to generate a first and a second current. Each of the currents has a predefined polarity sign, and is designed to determine the first and/or second and/or third voltages applied at a first and/or second and/or third terminal when first and second currents flow and put the amounts of the voltages in relation to the coordinated currents such that line interruptions and/or short circuits can be detected at the first and/or second and/or third terminal.
    Type: Grant
    Filed: October 14, 2010
    Date of Patent: August 18, 2015
    Assignee: Continental Automotive GmbH
    Inventors: Stefan Barnikow, Frank Friedhof, Ekkehart-Peter Wagner
  • DEVICE AND METHOD FOR DIAGNOSING AN EXHAUST GAS SENSOR
    Publication number: 20120266647
    Abstract: A device for diagnosing an exhaust gas sensor, in particular a linear oxygen probe, for an internal combustion engine. A diagnostic unit is configured to control a first and a second current source in a coordinated manner in order to generate a first and a second current. Each of the currents has a predefined polarity sign, and is designed to determine the first and/or second and/or third voltages applied at a first and/or second and/or third terminal when first and second currents flow and put the amounts of the voltages in relation to the coordinated currents such that line interruptions and/or short circuits can be detected at the first and/or second and/or third terminal.
    Type: Application
    Filed: October 14, 2010
    Publication date: October 25, 2012
    Applicant: CONTINENTAL AUTOMOTIVE GMBH
    Inventors: Stefan Barnikow, Frank Friedhof, Ekkehart-Peter Wagner